According to my careful calculations, our current character count amounts to:
Non-humans: 4 Humans with magical powers: 4 Muggles: 5
(And then there are Chloe and Leo who are weird special cases who ruin my neat list.)
My point is: we can maybe do something with neat numbers like this? A body-swap, only it's more of a power-and-genetic-makeup-swap? Suddenly Yuuri has Sakura's magical powers to capture and seal Clow cards, while Sakura is a muggle. Lucifer is human while suddenly Leo sprouts wings and finds himself, to his great despair, irresistible to everyone around him.